Nonlinear Studies of Surfaces and Interfaces of Advanced Semiconductor Materials
Final rept. 1 Mar 1989-29 Feb 1992
OREGON UNIV EUGENE
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In the first studies of this kind, surface second harmonic generation SHG was used to examine and compare the structural and electronic properties of noble metals in electrolytic solutions and in UHV. In rotational anisotropy measurements on Aglll and Aulll, it was found that the structural symmetry and surface morphology is very similar for these surfaces in both solution and in UHV. Very detailed wavelength dependent studies were performed on Aglll in solution and in UHV in order to determine if the electronic properties of the metals in the two environments are similar. In comparative solutionUHV studies it was shown that for Culll in solution, a surface oxide film persists even under conditions where one might expect to have an oxide free surface.
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